iCalc24: Math game for iPhone

iCalc24 is a lovely puzzle game for both kids and adults sharpening their minds with fun.
The game rule is simple: given four numbers between 1 to 13, find a formula to get result as 24 using all four numbers with +-*/ and ().
For example: if the four numbers are 13, 7, 3, 5, then (7+(5*13))/4=24 is a solution.

Features of Basic Version
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* Single player mode
* Global and local Leaderboards
* OpenFeint social gaming network Integration(Support Achievements and so on)
* Auto save/resume game
* In Application Purchase to unlock to Full Version if you like iCalc24

Additional Features of Full Version
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* Two more challenging play levels: Medium and Hard
* Two player fight mode through WI-FI
* Coach mode to help you improve skill

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